Ore grinder and amalgamator



'(No Model.) 2 Sheets-Sheet 1.

o. N. MOORE.

ORB GRINDERAND AMALGAMATOR. No. 521,663. Patented June 19, 1894.

{No Model.)

, 2 Sheets-Sheet 2. O. N. MOORE.

ORB GRINDER AND AMALGAMATOR.

No. 521,663. Patented June 19, 1894.

we NATIONAL umoaRAFuma coMPANY,

WASMINGKON. a. c.

' ratus.

, drical extension A in the center.

NITED STATES PATENT OFFICE.

CHARLES N. MOORE, OF NEWHALL, CALIFORNIA.

' ORE GRINDER AND AMALGAMATOR.

SPECIFICATION forming part of Letters Patent No. 521,663, dated June 19,1894.

Application filed October 30, 1893. Serial No. 489.524:- (No model.)

To aZZ whom it may concern.-

3e it known that 1, CHARLES N. MOORE, a citizen of the United States,residing at Newhall, I .os Angeles county,State of California, haveinvented an Improvement in Ore Grinders and Amalgamators; and I herebydeclare the following to be a full, clear, and exact description of thesame.

My invention relates to an apparatus for gr nding and amalgamating oresor rock contaming precious metals.

It consists in certain details of construction which will be more fullyexplained by referencetotheaccompanyingdrawings,inwhich- Figure l is avertical section of my appa- Fig. 2 shows a driving mechanism.

A 1s a base of sufficient area fixed upon a suitable supportand having avertical cylin- Around this vertical extension fits the bored outcentral portion of the pan B, the bottom of which declines from thecenter to the rim or periphery which stands at a slight outward angle asshown.

Upon the bottom of the pan B are placed dies 0 suitably constructed andfitted to cover the bottom of the pan, and receive the wear caused bythe grinding. These dies are removable for the purpose of cleaning, orto replace when worn out. a

In the center of the standard A is fixed a stem or spindle E whichprojects vertically upward, and forms the shaft around which 1thecentral hub of the spur gear D is fitted to urn.

Upon the top of the hub, and forming a part of it, is the feeding hopperD, the center of which is in the form of a cone, declining outwardly toits junction with the bottom of the hopper sides. At this point openingsto are made through which the ore may be delivered upon the surface ofthe dies 0 within the pan B. Around the periphery of the lower part ofthe span B openings are made which are covered with'wire screen cloth d,and exterior to the pan is fitted the circular copper amalgamated troughc which is adapted to receive the pulp as it is discharged through thescreened, and within this trough any valuable metallic particles areamalgamated and saved. This annular trough has a discharge opening orchute upon one side for the escape of the lighter, worthless particles.In order to properly grind and pulverize the ore which falls into thepan from the hopper, I employ the rollers F which are in form offrustums of cones, the angle of the conical sides being such that whenthe side rests upon the dies 0 in the bottom of the pan, a shaftextending centrally through the conical rollers will be approximatelyhorizontal. These shafts G have their inner and outer ends respectivelyjournaled in boxes H which are let into the lower part of the hub, andof the periphery respectively, of the gear wheel D.

The pan B is caused to rotate in one direction, while the rollers F,traveling upon its bottom, are rotated with relation to the pan,

by means of the following mechanism: I I are horizontal shafts journaledupon suitable supports extending radially outward beneath the bottom ofthe pan B, and havins xed to them the beveled driving pinions K K. Uponthese shafts are anti-friction rollers J, upon which adownwardlyprojecting flange from the bottom of the pan is adapted totravel. The beveled pinions K on the shafts I are adapted to mesh withcorresponding teeth upon the bottom of the pan B exterior to theanti-friction supporting wheels J, so that by the rotation of the shaftsI I the pan will be driven in one direction. As there are two of theseshafts upon opposite sides of the pan,

it will be manifest that they must be driven in opposite directions.Power to drive these shafts I is derived from a driving countershaft Lhaving upon it a sprocket-wheel M, and a chain N passes around thissprocketwheel, and acorresponding sprocket-wheel M which is fixeddirectly to the shaft I upon one side of the pan, while upon theopposite side, a corresponding chain passes around a sprocket-wheel, theshaft of which carries a spur gear, and this gear meshes with acorresponding gear upon the shaft I upon that side, so that by means ofthe intermediate gear, the motion of this shaft is reversed from that ofthe shaft upon the opposite side,both

shafts thus acting to drivethe pan in one di-. rection.

In order to rotate the gear-wheel D, and with it the conical crushingrollers F whose shafts are journaled in the gear-wheel, as beforedescribed, I have shown vertical shafts O journaledin boxes P havingkeyed upon the upper end, driving pinions Q, the teeth of which engagewith the teeth of the gearD and rotate it oppositely to the pan B. Thesevertical shafts 0 have fixed upon them the beveled pinions R, and thesepinions are ongaged by the bevel-wheels S which are fixed to thehorizontal shafts I, so that when the horizontal shafts I are driven aspreviously desoribedflthey will transmit motion to the pan B, andthrough the bevel gears R and S,

and the shafts 0 to the pinions Q, and thence to the spur gear D whichcarries the grinding rollers F.

The whole mechanism is easily separated by lifting the spur gear I) withthe hopper and grinding rollers from the pan, after which the pan may belifted, the dies removed, cleaned and replaced, the trough c cleansed ofamalgam, and the whole replaced again ready for work.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A grinding pan having the inclined bottom,a fixed central post with astandard about which the center of the pan is fitted to revolve,horizontal shafts extending outwardly from beneath the bottom of thepan, anti-friction rollers upon said shafts, and flanges upon the bottomof the pan adapted to travel upon said rollers, a toothed gearsurrounding the bottom of the pan, pinions upon the horizontal shaftsengaging said gear, and mechanism whereby the shafts are driven so as totransmit motion to the pan, together with grinding shoes or rollersmovable over the bottom of the pan, the horizontal gear wheel above andof greater diameter than said pan and having bearings in which saidshoes or rollers are mounted, and gearing connecting said horizontalshafts with said roller carrying gear wheel substantially as hereindescribed.

2. A grinding pan having the inclined bottom, dies fixed therein, acentral base and standard about which the center of the pan is fitted torotate, radialshafts extending outwardly beneath the bottom of the pan,antit'riction rollers upon said shafts by which the pan is supported, agear around the periphery of the bottom of the pan and pinions upon theshafts adapted to engage the gear, sprocket wheels fixed upon the shaftsand receiving power by chains from other sprocket-wheels fixed upon adriving counter-shaft, conical rollers having horizontal shaftsjournaled in a gear-wheel turning loosely above the top of the pan andintermediate gears whereby motion is transmitted to drive said gear andthe crushing rollers with relation to the pan, substantially as hereindescribed.

3. A grinding pan having theinclined bottom and dies, radial shafts withsupporting anti-friotion rollers upon which the pan rests, pinions uponthe shafts and a gear upon the pan bottom through which motion istransmitted to rotate the pan, a central base and standard about whichthe center of the pan is fitted to rotate, a fixed spindle extendingupwardly from the standard, a gear of larger diameter than that of thepan having a central hub fitted to rotate upon the spindle, conicalrollers, the shafts of which are journaled in boxes in the hub and rimof the gear, so that the rollers travel upon the dies on the pan bottom,vertical shafts having spur pinions adapted to engage the gear, andbevel gears upon said shafts and upon the main driving shafts wherebymotion is communicated to rotate the gear and the crushing rollerssimultaneously with the movement of the pan, substantially as hereindescribed.

4. A grinding pan having the conical bottom and die mechanism by which arotary motion is imparted to the pan about a central base and standard,a vertical spindle extending upward from the standard, a spur gear oflarger diameter than that of the pan, intermediate gears whereby motionis transmitted from the main driving shafts to rotate the pan and thegear, crushing rollers, the peripheries of which fit the bottom of thepan, and the shafts of which are journaled so as to be driven by thegear, a hopper extending upwardly from the hub of the gear having aconical bottom,anddischargeopeningsaround the periphery through whichore is delivered between the crushing rollers and the bottom of the pan,substantially as herein described.

5. A grinding pan having the inclined bottom and dies fitted thereon,conical rollers with horizontal shafts ahorizontal gear-wheel having thesame axis of rotation as the pan, and journal-boxes in which the shaftsof the grinding rollers are carried, a central conical hopper adapted todeliver ore around its pe' riphery between the grinding rollers and thebottom of the pan, horizontal radial shafts with pinions engaging a gearupon the bottom of the pan, and vertical shafts with gears engagingtheperiphery of the gear which carries the crushing rollers,intermediate gears and pinions whereby the vertical shafts are drivenand the pan and crushing rollers rotated simultaneously, openings withscreens fitted around the bottom and outer periphery of the pan, and asurrounding amalgamated copper trough into which the pulp is dischargedthrough the screens, substantially as herein described.

In witness whereof I have hereunto set my hand.

CHARLES N. MOORE. Witn esses:

J. F. POWELL, GEO. CAMPTON.

